/*
Problem:    Container With Most Water
Notes:
Given n non-negative integers a1, a2, ..., an, where each represents a point at
coordinate (i, ai). n vertical lines are drawn such that the two endpoints of
line i is at (i, ai) and (i, 0). Find two lines, which together with x-axis forms
a container, such that the container contains the most water.
Note: You may not slant the container.
*/